A Doppler sensor for non-invasive continuous Doppler monitoring for arterial blood flow to a distal body part of a patient that employs a Doppler transducer holder for placement at the distal body part of the patient. The holder is adapted to allow the sensor to be inserted and removed, enabling a sterile sensor for each new use. The holder may be disposable after each use, may be provided with a cover for disposal of the cover after each use and re-use of the holder, and the sensor may be provided with a cover for sterile placement against the patients body.
